* {
    margin: 0;
    padding: 0;
}
body {
    font-size: 14px;
    font-family: "Microsoft YaHei", sans-serif;
    color: #333;
}
ul{
    list-style: none;
}
a{
    color: #333;
    text-decoration: none;
}
/*顶部导航*/
.qq_nav {
    height: 150px;
    background: url("../img/nav_bg.png") repeat-x;
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
}
.qq_nav .wrapper {
    width: 1080px;
    height: 75px;
    margin: 0 auto;
}
.qq_nav .wrapper .left-logoimg {
    float: left;
}
.qq_nav .wrapper .left-logoimg .qq-logo {
    width: 100px;
    height: 75px;
    background: url("../img/nav_brand.png") no-repeat center;
    float: left;
}
.qq_nav .wrapper .left-logoimg ul {
    float: right;
}
.qq_nav .wrapper .left-logoimg ul li {
    float: left;
    font-size: 18px;
    line-height: 75px;
    margin-left: 20px;
}
.qq_nav .wrapper .left-logoimg ul li a {
    display: block;
    padding: 0 20px;
}
.qq_nav .wrapper .left-logoimg ul li a.active,
.qq_nav .wrapper .left-logoimg ul li a:hover {
    background: #12b7f5;
}
.qq_nav .wrapper .right-login {
    position: relative;
    float: right;
}
.qq_nav .wrapper .right-login .qq-login {
    float: left;
    display: block;
    text-align: center;
    width: 96px;
    height: 36px;
    background: #12b7f5;
    border-radius: 15px;
    line-height: 36px;
    font-size: 16px;
    color: white;
    margin-top: 19px;
}
.qq_nav .wrapper .right-login ul {
    float: right;
}
.qq_nav .wrapper .right-login ul li {
    float: left;
    margin-left: 40px;
    line-height: 50px;
}
.qq_nav .wrapper .right-login ul li a {
    font-size: 14px;
    text-shadow: 0 0 2px black;
}
.qq_nav .wrapper .right-login span {
    position: absolute;
    top: 55px;
    right: 0px;
}

/*展示开始*/
.qq_banner {
    height: 880px;
    background: url("../img/banner-bg.jpg");
    padding-top: 150px;
}
.qq_banner img {
    display: block;
    margin: 20px auto 0;
}

/*沟通*/
.qq_sound {

}
.qq_sound h1 {
    height: 321px;
    background: url("../img/sound-text.png") no-repeat center/cover;
    font-size: 0;
    margin-top: 100px;
}
.qq_sound .qq_sound_gire_bg {
    height: 500px;
    background: url("../img/sound-bg.jpg") no-repeat center/cover;
    background-attachment: fixed;
}
.qq_sound .sound_wrapper {
    height: 500px;
    width: 980px;
    margin: 0 auto;
    position: relative;
}
.qq_sound .sound_wrapper .iphone {
    position: absolute;
    height: 680px;
    width: 664px;
    background: url("../img/sound-phone.png") no-repeat;
    top: -200px;
    left: 0px;
}
.qq_sound .sound_wrapper h2 {
    text-align: right;
    float: right;
    padding-top: 100px;
    width: 500px;
    font-size: 40px;
}
.qq_sound .sound_wrapper p {
    float: right;
    text-align: right;
    padding-top: 50px;
    width: 500px;
    font-size: 18px;
    text-shadow: 0 0 2px #333;
}

/*文件*/
.qq_file {

}
.qq_file .qq_file_bg {
    height: 500px;
    background: url("../img/file-bg.jpg") no-repeat center/cover;
    background-attachment: fixed;
}
.qq_file .file_wrapper {
    height: 500px;
    width: 980px;
    margin: 0 auto;
    position: relative;
}
.qq_file .file_wrapper .conmentple {
    position: absolute;
    width: 600px;
    height: 340px;
    background: url("../img/file-mac.png") no-repeat;
    top: 60px;
    right: -35px;
}
.qq_file .file_wrapper h2 {
    text-align: left;
    float: left;
    padding-top: 100px;
    width: 500px;
    font-size: 40px;
}
.qq_file .file_wrapper p {
    float: left;
    text-align: left;
    padding-top: 50px;
    width: 500px;
    font-size: 18px;
    text-shadow: 0 0 2px #333;
}

/*兴趣*/
.qq_interest .qq_interest_bg {
    height: 500px;
    background: url("../img/interest-bg.jpg") no-repeat center/cover;
    background-attachment: fixed;
}
.qq_interest .interest_wrapper {
    height: 500px;
    width: 980px;
    margin: 0 auto;
    position: relative;
}
.qq_interest .interest_wrapper .interest_iphone {
    position: absolute;
    width: 350px;
    height: 500px;
    background: url("../img/interest-phone.png") no-repeat;
    top: -0px;
    left: 0px;
}
.qq_interest .interest_wrapper h2 {
    text-align: right;
    float: right;
    padding-top: 100px;
    width: 500px;
    font-size: 40px;
}
.qq_interest .interest_wrapper p {
    float: right;
    text-align: right;
    padding-top: 50px;
    width: 500px;
    font-size: 18px;
    text-shadow: 0 0 2px #333;
}